WO1991000426A1 - Atomization arrangement - Google Patents

Atomization arrangement Download PDF

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Publication number
WO1991000426A1
WO1991000426A1 PCT/DE1990/000402 DE9000402W WO9100426A1 WO 1991000426 A1 WO1991000426 A1 WO 1991000426A1 DE 9000402 W DE9000402 W DE 9000402W WO 9100426 A1 WO9100426 A1 WO 9100426A1
Authority
WO
WIPO (PCT)
Prior art keywords
arrangement according
flow
ring channel
arrangement
air
Prior art date
Application number
PCT/DE1990/000402
Other languages
German (de)
French (fr)
Inventor
Willibald Schuerz
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to KR1019910700217A priority Critical patent/KR920701666A/en
Priority to DE9090908460T priority patent/DE59000361D1/en
Priority to BR909006834A priority patent/BR9006834A/en
Publication of WO1991000426A1 publication Critical patent/WO1991000426A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles

Definitions

  • the invention relates to an arrangement for atomizing liquids according to the preamble of the main claim.
  • the invention therefore lies in the field of atomization of liquids by means of compressed air extracted from the vacuum or by using the negative pressure in the intake manifold of internal combustion engines.
  • Fuels in particular fuels, which are to be processed into combustion mixtures for internal combustion engines with external mixture formation, are used as liquids.
  • the vacuum in the intake manifold ends so that the air expanding at an annular gap detects the fuel jet emerging from the mouth of the injection valve with high speed. The large inductance between air and fuel leads to atomization.
  • this type of atomization is disadvantageous in that the fine droplets resulting from the atomization process are accelerated to high speed in the air stream, so that they are sometimes no longer able to follow a flow deflection of the intake air.
  • the droplets hit the suction pipe wall and contribute to the formation of the wall film.
  • For the eccentricity of the force Only very small tolerances are permitted in the jet of air. Excessive manufacturing tolerances in this area lead to a lateral deflection of the atomized fuel jet, which in turn results in an increased fuel misalignment between the individual cylinders of a multi-cylinder machine in the case of central injection.
  • a fuel injection device for internal combustion engines in which the opening of an injection valve is directed into an auxiliary air nozzle, the fuel and the air being processed in a swirl chamber formed therein by swirling.
  • the air is supplied tangentially into the interior of the auxiliary air nozzle.
  • the arrangement according to the invention for atomizing liquids with the characteristic features of the main claim has the advantage that the liquid droplets from the arrangement are able to follow the flow of air through the suction air and they are able to follow the flow of the suction air.
  • the misalignment of fuel between the individual cylinders of a multi-cylinder internal combustion engine can e.g. In the case of central injection, this is particularly effective in the full load range.
  • the amount of liquid in the form of a wall film is also reduced, so that the transient behavior is positively influenced by the internal combustion force.
  • the atomized liquid jet emerging from the arrangement has a very good jet symmetry, so that there is no misalignment, in particular lateral deflection of the liquid jet. This is particularly important in the case of internal combustion engines.
  • FIG. 1 shows the sectional illustration of a central injection unit with the arrangement of the invention
  • FIG. 2 shows a detail of FIG. 1 namely the arrangement according to the invention
  • FIG. 3 is a section along the line AA of FIG. 2 and FIG Section along the line BB of FIG. 2
  • FIGS. 5 and 6 are axonometric representations of the air and liquid flow through the arrangement according to the invention.
  • the invention is explained on the basis of a central injection unit, but is not restricted to use with such a central injection unit.
  • the invention is also not limited to fuel atomization, but any liquid that needs to be atomized can be used in the present invention.
  • the central injection unit according to Fig.l has an injection valve 1 and is mounted directly on the intake manifold and supplies the engine finely prepared fuel.
  • it consists of a pressure regulator 2 connected to it via a line 7 and a throttle valve housing 9 with a throttle valve 10.
  • the structure of the central injection unit is known and will not be explained further here.
  • an intermediate ring 6 which encloses an arrangement 11 according to the invention, to which two air lines lead.
  • This arrangement 11 according to the invention is shown in more detail in FIG.
  • the injection valve has a valve seat, via which the valve is opened and closed.
  • a housing 12 is arranged on the injection valve 1 with an annular disk 13, the housing 12 being provided in various planes with annular air supply lines 4, 5, which are separated from one another by a web 21.
  • These air inlets 4, 5 receive compressed air from the air lines 30, 31.
  • a separating ring 22 is inserted into the housing 12, in which at least one upper slot 15 connected to the upper air inlet 4 and at least one with the lower air supply 5 connected lower slot 16 are machined.
  • 3 and 4 also show, two upper slots ⁇ and two lower slots 16 are provided in the embodiment shown.
  • Each upper slot 15 of the upper level opens tangentially into an upper ring channel 23 and each lower slot 16 of the lower level tangentially opens into a lower ring channel 24.
  • the slots 15, 16 taper in the circumferential direction.
  • the ring channels 23 and 24 taper with decreasing radius in the axial direction up to an upper gap 25 or up to a lower gap 26 and open into a central cylinder opening 14, which is also supplied with the fuel jet.
  • the gap 25 and 26 are also ring-shaped.
  • the upper slot 15, the upper ring channel 23 and the upper gap 25 are moved towards the top by the ring disc 13 limited.
  • the annular disc 13 has a through opening 29 aligned with the valve mouth 3, which is followed by the gap 25 in the flow direction, the cylinder opening 14 and the lower gap 26.
  • the cylinder opening 14 extends axially through the separating ring 22 into the housing 12.
  • the fuel jet which enters the cylinder opening 14 in alignment with this through the valve mouth 3, is caused by the vortex flow (air vortex) emerging from the upper gap 25 of the upper vertebrae and the momentum exchange between air and fuel takes place here.
  • the direction of air flow via the lower slots 16 in the lower vortex plane is oppositely directed to the air flow direction via the upper slot 15 in the upper plane of the vertebra, so that in the lower vortex plane a fuel is released to the upper vortex plane.
  • the velocity component of the air flow increases in a radial and tangential direction with a decreasing radius of the ring channels 23, 24 and a desired high speed of the air vortices can be achieved in this way .
  • FIG. 5 The upper vertebral plane is shown in FIG. 5 and the lower vertebral plane in FIG. 6. It can be seen in FIG. 5 that an air stream 17 is brought clockwise over the upper slits 15 into the annular channel 23, swirls the fuel jet 19 over the upper gap 25 and then leaves the upper vortex flow through the cylinder opening 14. 6, the air is supplied via the lower slots 16 and the air flow 18 now swirls around the fuel jet 19 in the clockwise direction. the opposite direction and also leaves the underside of the vortex through the cylinder opening 14. If the eddy currents of the air streams 17 and 18 are the same size, the rotation of the total flow downstream of the lower gap 26 is then lifted and a tube 26 is removed Fuel-air mixture supplied.
  • the ratio of the cross-sectional area of the vertical cylinder opening 14 to the respective sum of the areas of the slots 15, 10 16 is chosen to be correspondingly large, then it is guaranteed that the speed component remains in the direction of the longitudinal axis. This also ensures that the exit velocity of the fuel droplets from the exit opening 28 is small.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Nozzles (AREA)

Abstract

In known atomization arrangements for liquids for injection valves, a tangential air inlet is provided in a space located behind the injection valve in the direction of flow. The aim of the new arrangement is to improve the generally imperfect distribution of fuel to the various cylinders of an internal combustion engine. To this end, the atomization space has two superimposed planes with a tangential air inlet (15, 16). The air inlets (15,16) in the individual planes point in opposite directions, so that two opposing eddy currents are produced. The arrangement is particularly suited for injection valves for internal combustion engines.

Description

Anordnunα zur ZerstäubunαArrangement to atomization
Stand der TechnikState of the art
Die Erfindung geht aus von einer Anordnung zur Zerstäubung von Flüssigkeiten nach der Gattung des Hauptanspruches. Die Erfindung liegt also auf dem Gebiet der Zerstäubung von Flüssigkeiten mittels frεmdεrzεugter Druckluft oder Nutzung des Unterdruckεs im Saugrohr von Brεnnkraftmaschinεn. Als Flüssigkeiten kommεn insbεsondere Kraftstoffe, die zu Brenngemischεn für Brennkraftmaschinen mit äußerer Gemischbildung aufbereitet wεrdεn sollen, in Vεrwεndung. Bishεr hat man zur Zεrstäubung von Kraftstoffεn Druckluft DZW. Un- tεrdruck im Saugrohr so angε endet, daß die an einεm Ringspalt ex¬ pandierende Luft mit hoher Gεsch indigkεit den aus dεr Mündung αes Einspritzventilεs austretendεn Kraftstoffstrahl erfaßt. Diε große Gεsch indigkεitsάiffεrεn∑ zwischen Luft und Kraftstoff führt zur Zεrstäubung.The invention relates to an arrangement for atomizing liquids according to the preamble of the main claim. The invention therefore lies in the field of atomization of liquids by means of compressed air extracted from the vacuum or by using the negative pressure in the intake manifold of internal combustion engines. Fuels, in particular fuels, which are to be processed into combustion mixtures for internal combustion engines with external mixture formation, are used as liquids. You also have compressed air DZW for atomizing fuel. The vacuum in the intake manifold ends so that the air expanding at an annular gap detects the fuel jet emerging from the mouth of the injection valve with high speed. The large inductance between air and fuel leads to atomization.
Diεsε Art der Zerstäubung ist jedoch nachteilig, indem die aus dem Zεrstäubungsprozεß rεsultierendεπ feinen Tröpfchen im Luftstrom auf hohe Geschwindigkeit bεschleunigt werden, so daß sie teilweise nicht mehr in der Lage sind, einer Strömungsumlenkung dεr Ansaug¬ luft zu folgen. Die Tröpfchen prallen gεgen die Saugrohrwand und tragen zur Wandfilmbildung bei. Für die Exzentrizität der Kraft- Stoffeinbringung in den Strahl der Luft sind nur sεhr gεringe To¬ leranzen zulässig. Zu große Fertigungstoleranzen in diesem Bereich führen zu einer seitlichen Ablenkung des zerstäubten Kraftstoff- strahlεs, woraus in dεr Folge einε εrhöhtε Kraftstoffehlverteilung zwischen dεn εinzεlnen Zylindern einer Mehrzylindermaschine bei Zεntralεinspritzung rεsultiεrt. Es ist auch bereits eine Kraft¬ stoffeinspritzvorrichtung für Brennkraftmaschinen bekannt, bei der diε Mündung εines Einspritzventiles in eine Hilfsluftdüse gεrich- tet ist, wobei in einεr darin ausgεbildεten Wirbel kammer dεr Kraft- stoff und die Luft durch Verwirbelung aufberεitεt wεrdεn. Diε Luft¬ zufuhr erfolgt hier tangential in den Innenraum dεr Hilfsluftdüsε.However, this type of atomization is disadvantageous in that the fine droplets resulting from the atomization process are accelerated to high speed in the air stream, so that they are sometimes no longer able to follow a flow deflection of the intake air. The droplets hit the suction pipe wall and contribute to the formation of the wall film. For the eccentricity of the force Only very small tolerances are permitted in the jet of air. Excessive manufacturing tolerances in this area lead to a lateral deflection of the atomized fuel jet, which in turn results in an increased fuel misalignment between the individual cylinders of a multi-cylinder machine in the case of central injection. A fuel injection device for internal combustion engines is also known, in which the opening of an injection valve is directed into an auxiliary air nozzle, the fuel and the air being processed in a swirl chamber formed therein by swirling. The air is supplied tangentially into the interior of the auxiliary air nozzle.
Vortεile der ErfindungAdvantages of the invention
Die εrfindungsgεmäße Anordnung zur Zerstäubung von Flüssigkeitεn mit dεn kεnnzεichnεndεn Merkmalen des Haiptanspruches hat demgεgεn- übεr dεn Vortεil, daß durch diε niεdrigε Austrittsgεschwindigkεit der Flüssigkeitströpfchen aus der Anordnung, diese in der Lage sind, Strömungsumlenkungεn der Ansaugluft zu folgen. Die Kraftstoffehl- vertεilung zwischεn den einzεlnεn Zylindεrn εiner Mehrzylinderbrenn- kraftmaschinε kann z.B. bεi Zεntralεinspritzung dadurch insbεsonde- rε im Vollastbεrεich wirkungsvoll vεrringεrt werden. Die Mengε an wandfilmför iger Flüssigkeit wird εbenfalls vεrringεrt, wodurch bεi Brεnnkraft aschinεn das Instationärverhalten positiv beeinflußt wird. Der aus der Anordnung austrεtende, zerstäubte Flüssigkeits¬ strahl weist eine sehr gute Strahlsymmεtriε auf, so daß kεine Fehl- vεrtεilung, insbεsondεrε sεitliche Ablenkung des Flüssigkeitsstrah- lεs, auftritt. Di s ist insbesonderε bεi Brεnnkraftmaschinen von großer Bedεutung.The arrangement according to the invention for atomizing liquids with the characteristic features of the main claim has the advantage that the liquid droplets from the arrangement are able to follow the flow of air through the suction air and they are able to follow the flow of the suction air. The misalignment of fuel between the individual cylinders of a multi-cylinder internal combustion engine can e.g. In the case of central injection, this is particularly effective in the full load range. The amount of liquid in the form of a wall film is also reduced, so that the transient behavior is positively influenced by the internal combustion force. The atomized liquid jet emerging from the arrangement has a very good jet symmetry, so that there is no misalignment, in particular lateral deflection of the liquid jet. This is particularly important in the case of internal combustion engines.
Durch diε in dεn Untεransprüchεn aufgεführten Maßnahmen sind vor¬ teilhaftε Weitεrbildungεn und Verbesserungεn dεr im Hauptanspruch angεgebenεn Anordnung möglich.The measures listed in the sub-claims make it possible to advantageously further develop and improve the arrangement specified in the main claim.
Es ist günstig, wenn die in vεrschiεdεnεn, übereinander!iεgεnden Ebenen vorgesehεnεn Schlitzε jεwεils in εinεn Ringkanal münden und die Ringkanälε sich mit abnεhmεnde Radius verjüngen und in eine Zy- lindεröffnung mündεn. Es ist überdies günstig, wenn jedem Ringkanal mεhrεrε, insbεsondεre zwei Schlitzε zugeordnεt sind. Durch diε Aus- Wahlmöglichkeit dεr Anzahl dεr tangential einmündεnden Schlitze pro Wirbelebene und die geometrische Lage der Schlitze der oberen bzw. unterεn Wirbelebene zueinander kann die Geomεtriε dεs zεrstäubtεn Flüssigkeitsstrahles und bei Verwendung von Kraftstoffen die Kon- zεntrationsvεrteilung dεr Kraftstofftröpfchεn im Einspritzstrahl be- einflußt werden. Dadurch erhält man ein weitεrεs Mittel durch die Zεrstäubung dεs Kraftstoffεs, diε Kraftstoffehlverteilung zwischen dεn einzelnen Zylindern zu verringern.It is expedient if they differ, one above the other Planes provided in the slit jεwεils open in εinεn ring channel and the ring channels taper with decreasing radius and open into a cylinder opening. In addition, it is favorable if each ring channel, in particular two slots, is assigned. Through the choice of the number of the tangentially opening slots per vortex plane and the geometrical position of the slots of the upper or lower vortex plane relative to one another, the geometry of the atomized liquid jet and, when using fuels, the concentration distribution of the fuel droplet flow can be influenced in the injection. This results in a further means of atomizing the fuel to reduce the misalignment of fuel between the individual cylinders.
Zeichnungdrawing
Die Erfindung ist in den Zeichnungεn bεispiεlsweise dargεstεllt. Es zεigεn Fig.l die Schnittdarstellung einer Zentraleinspritzεinhεit mit der Anordnung der Erfindung, Fig.2 ein Detail der Fig.l nämlich die eigεntlichε εrfindungsgemäße Anordnung, Fig.3 ist ein Schnitt entlang der Linie A-A der Fig.2 und Fig.4 ist ein Schnitt entlang der Linie B-B der Fig.2, die Fig. 5 und 6 sind axonometrische Dar¬ stellungen der Luft- und Flüssigkeitsströmung durch die erfindungs¬ gemäße Anordnung.The invention is shown in the drawings, for example. 1 shows the sectional illustration of a central injection unit with the arrangement of the invention, FIG. 2 shows a detail of FIG. 1 namely the arrangement according to the invention, FIG. 3 is a section along the line AA of FIG. 2 and FIG Section along the line BB of FIG. 2, FIGS. 5 and 6 are axonometric representations of the air and liquid flow through the arrangement according to the invention.
Beschrεibung εinεs AusführungsbeispielεsDescription of the exemplary embodiment
Diε Erfindung wird anhand einer Zentraleinspritzeinhεit dargelegt, ist jedoch nicht auf die Anwendung bei einer derartigen Zentralein¬ spritzeinhεit eingeschränkt. Die Erfindung ist auch nicht auf die Kraftstoffzerstäubung beschränkt, sondern es kann jede Flüssigkeit, die zerstäubt werdεn muß, bεi dεr vorliegenden Erfindung eingεsetzt werden.The invention is explained on the basis of a central injection unit, but is not restricted to use with such a central injection unit. The invention is also not limited to fuel atomization, but any liquid that needs to be atomized can be used in the present invention.
Die Zentraleinspritzεinhεit nach Fig.l besitzt ein Einspritzventil 1 und ist direkt auf dem Saugrohr montiert und versorgt den Motor mit fein aufberεitεtεm Kraftstoff. Sie bestεht neben dem Einspritzventil 1 aus einεm mit diesem über einε Lεitung 7 vεrbundεnen Druckreglεr 2 und einem Drossel klappengεhäusε 9 mit einεr Drosselklappε 10. Dεr Aufbau εinεr dεrartigεn Zεntraleinspritzeinheit ist bekannt und soll hier nicht weiter erläutert werden.The central injection unit according to Fig.l has an injection valve 1 and is mounted directly on the intake manifold and supplies the engine finely prepared fuel. In addition to the injection valve 1, it consists of a pressure regulator 2 connected to it via a line 7 and a throttle valve housing 9 with a throttle valve 10. The structure of the central injection unit is known and will not be explained further here.
Zwischen dεm Drosselklappengεhäusε 9 und einem das Einspritzventil lagernden Obergehäusε 8 ist εin Zwischenring 6 vorgesεhen, der eine erfindungsgemäße Anordnung 11 umschließt, zu der zwei Luftleitungεn führεn. Diεsε εrfindungsgεmäßε Anordnung 11 ist in Fig. nähεr dar¬ gestellt.Between the throttle valve housing 9 and an upper housing 8 supporting the injection valve, an intermediate ring 6 is provided, which encloses an arrangement 11 according to the invention, to which two air lines lead. This arrangement 11 according to the invention is shown in more detail in FIG.
Das Einspritzventil hat in bekanntεr Weise einεn Vεntilsitz, übεr den das Ventil geöffnet und geschlossεn wird. Untεrhalb dεr Ventil- mündung 3, also hinter dem Ventilsitz ist εin Gehäuse 12 abgedichtεt am Einspritzventil 1 mit einεr Ringscheibe 13 angeordnet, wobei das Gehäusε 12 in vεrschiedenεn Ebenen mit ringförmigen Luftzuführungen 4, 5 versehεn ist, die durch εinεn Steg 21 voneinandεr gεtrεnnt sind. Diεse Luftzuführungen 4, 5 erhaltεn Druckluft von dεn Luftleitungen 30, 31. Auf den Steg 21 ausgerichtεt,ist in das Gεhäuse 12 ein Trennring 22 eingesεtzt, in dεn wεnigstεns εin mit der oberen Luft¬ zuführung 4 verbundener,oberεr Schlitz 15 und wenigstens ein mit der unteren Luftzuführung 5 verbundener unterer Schlitz 16 eingearbeitεt sind. Wiε auch die Fig. 3 und 4 zeigεn, sind bεim gεzεigtεn Ausfüh- rungsbeispiel zwei obere Schlitzelδ und zwεi untere Schlitze 16 vor- gesehεn. Jedεr obere Schlitz 15 der oberen Ebene mündet tangential in einen oberεn Ringkanal 23 und jedεr untεrε Schlitz 16 dεr untε- rεn Ebene mündet tangential in einen unteren Ringkanal 24. Mit ab¬ nehmendem Radius verjüngen sich die Schlitze 15, 16 in Umfangsrich- tung. Die Ringkanäle 23 und 24 verjüngen sich mit abnehmendem Radius in axialer Richtung bis zu einεm oberen Spalt 25 bzw. bis zu einem unterεn Spalt 26 und mündεn in eine mittige Zylinderöffnung 14, der auch dεr Kraftstoffstrahl zugεführt wird. Diε Spaltε 25 und 26 sind εbenfalls ringförmig ausgebildet. Der oberε Schlitz 15, dεr obεre Ringkanal 23 und der oberε Spalt 25 wεrdεn nach obεn durch diε Ring- scheibe 13 begrenzt. Die Ringscheibε 13 hat eine zur Ventilmündung 3 fluchtendε Durchgangsöffnung 29, der in Strömungsrichtung dεr Spalt 25, die Zylinderöffnung 14 und der untere Spalt 26 folgen. Diε Zylinderöffnung 14 erstreckt sich axial verlaufend über den Trennring 22 bis in das Gehäuse 12. Der Kraftstoffstrahl, der über die Ventilmündung 3 in die zu dieser fluchtende Zylinderöffnung 14 eintritt, wird von der aus dem obεrεn Spalt 25 austretendεn Wirbel- Strömung (Luftwirbel) in der oberen Wirbelebenε εrfaßt und es er¬ folgt hier der Impulsaustausch zwischen Luft und Kraftstoff. Die Luftströmungsrichtung über die unteren Schlitze 16 in der unterεn Wirbelebenε ist zu dεr Luftströmungsrichtung übεr diε oberen Schlit¬ ze 15 in der oberεn Wirbεlεbene entgεgengεsεtzt gεrichtet, so daß in der unterεn Wirbelebεnε einε zur oberen Wirbelεbεne entgεgεnge- setzte Drehrichtung des Kraftstoffluftwirbels entsteht. Durch die- sε εntgegengεsetzten Drehrichtungεn dεr WirbelStrömungen wird die Drehbεwegung dεr Gesamtströmung stromabwärts dεs untεrεn Spaltεs 26 aufgεhobεn, so daß εin Ausschlεudεrn der Kraftstofftröpfchen aus dem über eine Austrittsöffnung 28 der Anordnung 11 austretenden Kraftstoff-Luft-Gemisch infolge Fliehkraftwirkung vermieden wird.In a known manner, the injection valve has a valve seat, via which the valve is opened and closed. Below the valve mouth 3, that is to say behind the valve seat, a housing 12 is arranged on the injection valve 1 with an annular disk 13, the housing 12 being provided in various planes with annular air supply lines 4, 5, which are separated from one another by a web 21. These air inlets 4, 5 receive compressed air from the air lines 30, 31. Aligned to the web 21, a separating ring 22 is inserted into the housing 12, in which at least one upper slot 15 connected to the upper air inlet 4 and at least one with the lower air supply 5 connected lower slot 16 are machined. 3 and 4 also show, two upper slots δ and two lower slots 16 are provided in the embodiment shown. Each upper slot 15 of the upper level opens tangentially into an upper ring channel 23 and each lower slot 16 of the lower level tangentially opens into a lower ring channel 24. With decreasing radius, the slots 15, 16 taper in the circumferential direction. The ring channels 23 and 24 taper with decreasing radius in the axial direction up to an upper gap 25 or up to a lower gap 26 and open into a central cylinder opening 14, which is also supplied with the fuel jet. The gap 25 and 26 are also ring-shaped. The upper slot 15, the upper ring channel 23 and the upper gap 25 are moved towards the top by the ring disc 13 limited. The annular disc 13 has a through opening 29 aligned with the valve mouth 3, which is followed by the gap 25 in the flow direction, the cylinder opening 14 and the lower gap 26. The cylinder opening 14 extends axially through the separating ring 22 into the housing 12. The fuel jet, which enters the cylinder opening 14 in alignment with this through the valve mouth 3, is caused by the vortex flow (air vortex) emerging from the upper gap 25 of the upper vertebrae and the momentum exchange between air and fuel takes place here. The direction of air flow via the lower slots 16 in the lower vortex plane is oppositely directed to the air flow direction via the upper slot 15 in the upper plane of the vertebra, so that in the lower vortex plane a fuel is released to the upper vortex plane. By means of this opposite direction of rotation of the vortex currents, the rotational movement of the total flow downstream of the bottom gap 26 is canceled, so that the fuel droplets from the fuel force exiting through an outlet opening 28 of the arrangement 11 and resulting from the mixture force exiting through an outlet opening 28 of the arrangement 11 are avoided.
Dadurch, daß die Ringkanäle 23, 24 sich mit abnεhmεndem Radius ver¬ jüngen, steigt die Geschwindigkeitskomponente der Luftströmung in radialer und tangentialεr Richtung mit abnehmendem Radius der Ring- kanäle 23, 24 und es läßt sich so einε gεwünschte hohe Geschwindig¬ keit der Luftwirbεl erreichen.Because the ring channels 23, 24 taper with a decreasing radius, the velocity component of the air flow increases in a radial and tangential direction with a decreasing radius of the ring channels 23, 24 and a desired high speed of the air vortices can be achieved in this way .
Zur Verdeutlichung ist in Fig.5 die obere Wirbelebene und in Fig.6 die untere Wirbelεbεne dargεstεllt. Man siεht in Fig.5, daß ein Luftstrom 17 im Uhrzeigersinn über die oberεn Schlitzε 15 in dεn Ringkanal 23 εingεbracht wird, über den oberen Spalt 25 den Kraft¬ stoffstrahl 19 umwirbelt und die oberε Wirbelebεπε dann durch die Zylinderöffnung 14 verläßt. In der unteren Wirbelebene gemäß Fig.6 erfolgt die Luftzufuhr über die unteren Schlitze 16 und die Luft- Strömung 18 wirbelt nun um den Kraftstoffstrahl 19 in dem Uhrzei- gεrsinn entgεgengesεtztεr Richtung und vεrläßt diε untεrε Wirbεlεbε- ne ebenfalls über die Zylindεröffnung 14.Sind die Wirbelströmungεn der Luftströme 17 und 18 glεich groß, so wird diε Drεhung des Ge¬ samtstromes stromabwärts des unterεn Spaltes 26 aufgεhoben und es 5 wird dem Saugrohr ein gut durchgεmischtes Kraftstoff-Luft-Gemisch zugelεitεt.The upper vertebral plane is shown in FIG. 5 and the lower vertebral plane in FIG. 6. It can be seen in FIG. 5 that an air stream 17 is brought clockwise over the upper slits 15 into the annular channel 23, swirls the fuel jet 19 over the upper gap 25 and then leaves the upper vortex flow through the cylinder opening 14. 6, the air is supplied via the lower slots 16 and the air flow 18 now swirls around the fuel jet 19 in the clockwise direction. the opposite direction and also leaves the underside of the vortex through the cylinder opening 14.If the eddy currents of the air streams 17 and 18 are the same size, the rotation of the total flow downstream of the lower gap 26 is then lifted and a tube 26 is removed Fuel-air mixture supplied.
Wählt man das Vεrhältnis aus Quεrschnittsflächε dεr vεrtikalen Zy¬ linderöffnung 14 zur jeweiligεn Summε dεr Flächεn der Schlitze 15, 10 16 entsprεchεnd groß, so ist gεwährleistet, daß diε Gεschwindig- kεitskomponεntε in Richtung dεr Vεntillängsachsε gεring bleibt. Damit ist auch sichergεstεllt, daß diε Austrittsgεschwindigkεit dεr Kraftstofftröpfchen aus dεr Austrittsöffnung 28 klεin ist.If the ratio of the cross-sectional area of the vertical cylinder opening 14 to the respective sum of the areas of the slots 15, 10 16 is chosen to be correspondingly large, then it is guaranteed that the speed component remains in the direction of the longitudinal axis. This also ensures that the exit velocity of the fuel droplets from the exit opening 28 is small.
15 Es sεi noch darauf hingewiesen, daß es sεlbstvεrständlich auch möglich ist, εine Abgasrückführung vorzusehεn, und daß man dεn Luftstrom 17, 18 durch einen Abgasstrom ersεtzεn kann. 15 It should also be pointed out that it is of course also possible to provide exhaust gas recirculation and that air flow 17, 18 can be replaced by an exhaust gas flow.

Claims

Ansprüche Expectations
1. Anordnung zur Zεrstäubung von Flüssigkεitεn, insbεsondεrε von durch ein Einspritzventil abgespritztem Kraftstoff für einε Brεnn- kraftmaschinε, wobεi auf die Flüssigkεit in εinem Raum eine durch Druckluft oder Abgas erzεugtε WirbelStrömung einwirkt, dadurch ge- kennzeichnet, daß der Raum durch eine Zylinderöffnung (14) gebildεt wird, in diε in zwεi übεrεinandεrliegenden Ebenen zwei getrεnntε WirbelStrömungen (17, 18) mit einander entgegengerichteten Strö¬ mungsrichtungen einmünden und auf die Flüssigkeit einwirken.1. Arrangement for the atomization of liquid kits, in particular of fuel sprayed through an injection valve for an internal combustion engine, the fluid flow in a room being influenced by a vortex flow generated by compressed air or exhaust gas, characterized in that the room is opened by a cylinder (14 ) is formed, in which two separated vortex flows (17, 18) with opposite flow directions open in two planes lying one above the other and act on the liquid.
2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß in der oberεn Ebene mindestεns εin oberer Schlitz (15), der tangential in einen oberen Ringkanal (23) mündet, und in der unterεn Ebenε min¬ destens ein unterer Schlitz (16) vorgesεhεn sind, dεr tangential so in einεn untεrεn Ringkanal (24) ündεt, daß sich im untεrεn Ringka- nal (24) eine WirbelStrömung (18) ergibt, deren Strömungsrichtung der WirbelStrömung (17) im oberen Ringkanal (23) entgegengerichtet ist.2. Arrangement according to claim 1, characterized in that in the upper level at least εin upper slot (15) which tangentially opens into an upper annular channel (23), and in the lower level at least one lower slot (16) are provided , tangentially so in a lower ring channel (24) that a vortex flow (18) results in the lower ring channel (24), the flow direction of which is opposite to the vortex flow (17) in the upper ring channel (23).
3.Anordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Schiit- ze (15, 16) sich mit abnehmendem Radius verjüngen.3. Arrangement according to claim 2, characterized in that the Schiit- (15, 16) taper with decreasing radius.
4. Anordnung nach Anspruch 2 oder 3, dadurch gekennzεichnet, daß die Ringkanäle (23, 24) sich mit abnehmendem Radius in axialer Richtung vεrjüngεn.4. Arrangement according to claim 2 or 3, characterized gekennzεichnet that the ring channels (23, 24) vεrjüngεn with decreasing radius in the axial direction.
5. Anordnung nach Anspruch 4, dadurch gekεnnzeichnet, daß der oberε Ringkanal (23) übεr einεn obεrεn Spalt (25) und dεr untεrε Ringkanal (24) über einen unterεn Spalt (26) in die die eingεspritztε Flüssig- keit aufnεhmende Zylindεröffnung (14) mündεn.5. Arrangement according to claim 4, characterized in that the upper Ring channel (23) via an upper gap (25) and the lower ring channel (24) via a lower gap (26) into which the cylinder opening (14) receiving the injected liquid opens.
6. Anordnung nach Anspruch 2, dadurch gεkεnnzεichnεt, daß das Ver¬ hältnis der Querschnittsflächε dεr Zylindεröffnung (14) zur Summε der jewεiligεn Quεrschnitte der Schlitze (15, 16) groß ist.6. Arrangement according to claim 2, characterized gεkεnnzεichnεt that the ratio of the cross-sectional area of the cylinder opening (14) to the sum of the respective cross-sections of the slots (15, 16) is large.
7. Anordnung nach Anspruch 1, dadurch gekεnnzεichnεt, daß die bei- dεn WirbelStrömungen (17, 18) gleich groß sind. 7. Arrangement according to claim 1, characterized gekεnnzεichnεt that the two eddy currents (17, 18) are the same size.
PCT/DE1990/000402 1989-06-28 1990-05-30 Atomization arrangement WO1991000426A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019910700217A KR920701666A (en) 1989-06-28 1990-05-30 Spray
DE9090908460T DE59000361D1 (en) 1989-06-28 1990-05-30 SPRAYING ARRANGEMENT.
BR909006834A BR9006834A (en) 1989-06-28 1990-05-30 ARRANGEMENT FOR ATOMIZATION

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3921079.0 1989-06-28
DE3921079A DE3921079A1 (en) 1989-06-28 1989-06-28 SPRAYING ARRANGEMENT

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WO1991000426A1 true WO1991000426A1 (en) 1991-01-10

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JP (1) JPH04501450A (en)
KR (1) KR920701666A (en)
AU (1) AU621492B2 (en)
BR (1) BR9006834A (en)
DE (2) DE3921079A1 (en)
ES (1) ES2036115T3 (en)
WO (1) WO1991000426A1 (en)

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US5988708A (en) * 1995-08-24 1999-11-23 Harrow Products, Inc. Electromagnetically managed latching exit bar

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ES2258458T3 (en) * 1999-05-20 2006-09-01 Kos Life Sciences, Inc. LOW FORCE SPRAYING AND LOW RETENTION ATOMIZATION SYSTEM.
DE10041440A1 (en) * 2000-08-23 2002-03-07 Bosch Gmbh Robert Swirl disk and fuel injector with swirl disk
CN1526053A (en) * 2001-06-01 2004-09-01 Fuel delivery system
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EP1384880A3 (en) * 2002-07-24 2004-12-15 Delphi Technologies, Inc. Non-contacting fuel vaporizer
EP4094019A4 (en) * 2020-01-22 2023-07-05 Turbogen Ltd. Atomizer for gas turbine engine

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Also Published As

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KR920701666A (en) 1992-08-12
EP0435973A1 (en) 1991-07-10
JPH04501450A (en) 1992-03-12
AU5669790A (en) 1991-01-17
DE3921079A1 (en) 1991-01-03
DE59000361D1 (en) 1992-11-19
EP0435973B1 (en) 1992-10-14
ES2036115T3 (en) 1993-05-01
AU621492B2 (en) 1992-03-12
US5178331A (en) 1993-01-12
BR9006834A (en) 1991-08-06

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